Seiko Cal. 6620 - 657

The Seiko 6620-657 represents an important milestone in Seiko's 1969 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-5fbefbc10501]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1969

Related Models

• Seiko 6348-170
• Seiko 5246-982
• Seiko 4516-497
• Seiko 3844-245
• Seiko 4486-395
• Seiko 7132-473
• Seiko 0722-803
• Seiko 5255-926
• Seiko 3882-879
• Seiko 3887-904
• Seiko 4558-381
• Seiko 7117-894